Download the 2025 HMRC SA100 Tax Return Form
Every year, countless individuals and businesses across the UK search for the HMRC tax return form to file their taxes accurately and on time.
One of the most common queries I see from non-clients is, “Where can I download the HMRC SA100 Personal Tax Return form?” This question spikes in popularity as the tax season approaches, particularly for those managing their self-assessment tax return independently.
In this guide, I’ll walk you through everything you need to know about finding, downloading, and submitting the 2024/25 HMRC tax return form, including key deadlines, filing options, and practical tips to make the process easier.
Why the HMRC SA100 Form Matters
The SA100 Personal Tax Return form is the cornerstone of the UK’s self-assessment system. It’s used by individuals to report their income, calculate their tax liability, and ensure compliance with HM Revenue and Customs (HMRC) regulations.
Whether you’re self-employed, a freelancer, a landlord, or someone with multiple income streams, completing this form accurately is critical to avoiding penalties and maximising allowable deductions.
However, finding the correct form can sometimes be a challenge. Last year, there was a period when the SA100 form was not readily available on the HMRC website. This caused frustration for many taxpayers who rely on the form to prepare their submissions early. After numerous inquiries and complaints, the form was reinstated.
Where to Download the 2024/25 HMRC Tax Return Form
Good news — the SA100 Personal Tax Return form for the 2024/25 tax year is now available for download directly from the official HMRC website.
Download the 2025 HMRC Tax Return Form
You can also follow these steps on the HMRC website:
- Visit the HMRC website.
- Navigate to the “Self Assessment” section.
- Locate the SA100 form for the 2024/25 tax year.
- Download the PDF version of the form.
Why Download the Form Early?
Downloading the form early allows you to:
- Familiarise yourself with the sections relevant to your income sources (employment, self-employment, property income, capital gains, etc.).
- Gather necessary financial documents such as P60s, P45s, bank statements, and expense receipts.
- Avoid the last-minute rush as deadlines approach, reducing stress and the risk of errors.
Key Deadlines for the 2024/25 Tax Year
Submitting your self-assessment tax return on time is crucial to avoid penalties and interest charges. HMRC provides two distinct deadlines depending on whether you’re filing a paper return or submitting online:
- Paper Tax Return Deadline: 31st October 2025 — If you choose to submit a physical copy, it must reach HMRC by this date. Make sure to allow time for postal delays and keep proof of postage.
- Online Tax Return Deadline: 31st January 2026 — Filing online is often more convenient and gives you a later deadline. You’ll need to register for HMRC’s online services in advance (this can take up to 10 working days).
Additional Deadlines to Note
- Tax Payment Deadline: Any tax owed for the 2024/25 tax year must be paid by 31st January 2026, regardless of whether you file on paper or online.
- Registering for Self-Assessment: If you’re new to self-assessment (for example, you started self-employment in the year to 5th April 2025), you must register with HMRC by 5th October 2025 to avoid penalties.
Paper vs Online Filing: Which Should You Choose?
Choosing between paper and online filing depends on your preferences and circumstances. Here’s a quick comparison:
Paper Filing
- Best for: Those who prefer physical records or have simpler tax affairs.
- Pros: No need for internet access; straightforward for basic returns.
- Cons: Earlier deadline (31st October 2025); slower processing by HMRC.
Online Filing
- Best for: Tech-savvy individuals, those with more complex tax situations, or anyone wanting a later deadline.
- Pros: Later deadline (31st January 2026); faster processing and refunds; ability to save progress and return later.
- Cons: Requires internet access and setting up an HMRC online account.
Regardless of your choice, always double-check all entries for accuracy, as mistakes can lead to enquiries or penalties.
Tips for Completing the 2024/25 HMRC Tax Return
Filling out the SA100 form can feel daunting, especially if you have multiple income streams or complex deductions. Here are some practical tips to make the process smoother:
- Organise Your Financial Records: Collect all relevant documents, including income statements, expense receipts, and bank records, before starting.
- Understand Allowable Expenses: If you’re self-employed, claim legitimate business expenses (such as office supplies, travel, or professional fees) to reduce your taxable income.
- Check for Tax Reliefs: Explore reliefs such as pension contributions, Gift Aid donations, or the Marriage Allowance to lower your tax bill.
- Use HMRC’s Guidance Notes: The SA100 form comes with detailed notes to help you complete each section correctly.
- Seek Professional Help if Needed: If your tax situation is complex (for example, rental income, foreign income, or capital gains), a tax professional can save you time and ensure compliance.
Need Help Completing Your Tax Return?
Completing the 2024/25 HMRC tax return doesn’t have to be stressful. Whether you’re filing on paper or online, I’m an experienced tax professional who can assist you.
I offer fixed-fee packages that include:
- Preparation and submission of your Self Assessment tax return
- Year-round support and advice
- Handling any HMRC correspondence
Why Work With Me?
I specialise in self-assessment tax returns, HMRC compliance, and tax planning for individuals and small businesses across the UK. By choosing to work with me, you’ll benefit from:
- Personalised advice tailored to your financial situation
- Up-to-date knowledge of HMRC regulations and tax-saving opportunities
- A commitment to making the tax process as simple and efficient as possible
Stay Ahead of the 2024/25 Tax Season
The HMRC SA100 Personal Tax Return form for the 2024/25 tax year is now available. By downloading the form early, organising your records, and understanding your filing options, you can avoid the stress of last-minute submissions and ensure compliance with HMRC.
For more resources, including the latest tax tips and updates, visit my blog.
If you have any questions about the 2024/25 tax return or need help with filing, don’t hesitate to reach out. I’m here to make your tax season as hassle-free as possible.